Sake is phenomenal in cocktails and pairs well with any spirit. However, beware, a sake's delicate flavour can be easily shrouded. Use a good quality sake...
About 7 years ago a Chinese restaurant called the China Rose in Rhinecliff closed down, and with it went the best sake drink I've ever had -- their frozen sake margarita. I'm a decent bartender but I never recaptured it exactly at home (now I know the secret ingredient that frozen drinks really need to come together, but back then I just tried to get the recipe off them -- no dice). You should try one of these: sake, lime juice, triple sec, xantham, into the blender, serve in coupes.